I think you're best off looking into putting your code into a module, whether that be basically a collection of utilities (where you may export certain routines) or an actual OO application. Which option you choose should depend on whether your program lends itself to an OO model--this won't necessarily be the case.

Take a look at use, package, perlmod, and the Exporter manpage. If you choose to go the object route, there's perlobj and some tutorials: perltoot and perlboot.